Debug Board v1

From Openmoko

Outdated warning ! This article or section is significantly outdated, either by significant hardware or software changes. Procedures mentioned in this page may well not work for current hardware/software.

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Questions

Errata

Serial Port / GSM_EN design problem

The debug board and GTA01Bv2 try to drive the same line (GSM_EN) which switches between serial console and GSM Modem. To resolve this conflict (and give ownership of that signal to GTA01), you need to unsolder both R105 and R106. Those resistors are located very close to the 2x10pin JTAG header.

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Outdated warning ! This article or section is significantly outdated, either by significant hardware or software changes. Procedures mentioned in this page may well not work for current hardware/software.

top side

bottom side

Hardware Components

RTL8019AS Ethernet MAC

This adds network connectivity during development

Two 7-segment LED displays

for debug output

Two DB-9 headers

Serial Console (level-shifted to true RS232 levels)

?

One DB-25 header

?

One 2x10pin 2.54mm header

JTAG Port

Schematics

(no longer present)

Usage instructions

Connectors

Debug cable to phone

Use the flat ribbon-cable to connect to the phone.

The wide end is for the Debug board, the narrow end for the phone

For both sides:

Lift the brown lever of the connector on the PCB

Place the copper contacts on the bottom (brown surface facing to the top.

Insert the ribbon cable as far as possible into the connector (it won't go in all the way, that's normal)

Secure Media

Questions

Errata

Serial Port / GSM_EN design problem

The debug board and GTA01Bv2 try to drive the same line (GSM_EN) which switches between serial console and GSM Modem. To resolve this conflict (and give ownership of that signal to GTA01), you need to unsolder both R105 and R106. Those resistors are located very close to the 2x10pin JTAG header.